Bills head coach Chan Gailey will be in the market for a new receivers coach. Bills aide Stan Hixon has an agreement to become an aide on the staff at Penn State, under new head coach Bill O'Brien, a source close to the school told The News. Hixon coached receivers for the Bills for the past two seasons. He and O'Brien worked together at Georgia Tech from 1995 to 1999. Hixon did a good job helping develop young receivers for the Bills under Gailey. Stevie Johnson had his best two years, while David Nelson and Donald Jones both produced as undrafted players.